I'm relatively 'new' to poker, so keep that in mind.

In that position I'd raise 2.5-3X the BB. As you said your limping and folding options are pretty much out of the question, since you undoubtedly have the best hand with their previous loose play. It's small enough to call, and big enough to get some money out of it.

Another option is to raise 4 or 5X the BB and just win the pot right there, but with your relatively small chip stack I don't think that's the wisest idea. You need to make a move, but a small move.